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PS8121A 07/21/97
Logic Block Diagram
Description
Pericom Semiconductor's PI74FCT3 series of logic circuits are
produced in the Company's advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
The PI74FCT3573 is an 8-bit transparent latch designed with
3-state outputs and is intended for bus oriented applications. When
Latch Enable (LE) is HIGH, the flip-flops appear transparent to
the data. The data that meets the set-up time when LE is LOW is
latched. When OE is HIGH, the bus output is in the high impedance
state.
The PI74FCT3573 can be driven from either 3.3V or 5.0V devices
allowing this device to be used as a translator in a mixed
3.3/5.0V system.
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PI74FCT3573
Fast CMOS 3.3V 8-Bit
Transparent Latch
Pinout
Inputs
(1)
Outputs
(1)
D
N
LE
OE
O
N
H
H
L
H
L
H
L
L
X
X
H
Z
Truth Table
Note:
1. H = High Voltage Level
X = Don't Care
L = Low Voltage Level
Z = High Impedance
Pin Description
Pin Name
Description
OE
Output Enable Input (Active LOW)
LE
Latch Enable Input (Active HIGH)
D7-D0
Data Inputs
O7-O0
3-State Outputs
GND
Ground
V
CC
Power
Features
Advanced Low Power CMOS Operation
Compatible with LVC class of products
Compatible with industry standard octal pinouts
Excellent output drive capability:
Balanced drives (24 mA sink and source)
Can serve as a 5V to 3V translator
Inputs can be driven by 3.3V or 5V devices
Low ground bounce outputs
Hysteresis on all inputs
Industrial operating temperature range: 40C to +85C
Packages available:
20-pin 173 mil wide plastic TSSOP (L20)
20-pin 150 mil wide plastic QSOP (Q20)
20-pin 150 mil wide plastic TQSOP (R20)
20-pin 300 mil wide plastic SOIC (S20)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Vcc
O0
O1
O2
O3
O4
O5
O6
O7
LE
OE
D0
D1
D2
D3
D4
D5
D6
D7
GND
20-Pin
L20
R20
Q20
S20
OE
LE
O
0
G
D
D
0
TO 7 OTHER CHANNELS
O
PI74FCT3573
3.3V 8-BIT TRANSPARENT LATCH
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PS8121A 07/21/97
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Storage Temperature ............................................................ 65C to +150C
Ambient Temperature with Power Applied ............................ 40C to +85C
Supply Voltage to Ground Potential (Inputs & Vcc Only) ..... 0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) .. 0.5V to +7.0V
DC Input Voltage .................................................................... 0.5V to +7.0V
DC Output Current .............................................................................. 120 mA
Power Dissipation .................................................................................... 1.0W
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the de-
vice. This is a stress rating only and functional opera-
tion of the device at these or any other conditions
above those indicated in the operational sections of
this specification is not implied. Exposure to abso-
lute maximum rating conditions for extended periods
may affect reliability.
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 2.7V to 3.6V)
Parameters
Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
V
IH
Input HIGH Voltage (Input pins)
Guaranteed Logic HIGH Level
2.2
--
5.5
V
Input HIGH Voltage (I/O pins)
2.0
--
5.5
V
V
IL
Input LOW Voltage
Guaranteed Logic LOW Level
0.5
--
0.8
V
(Input and I/O pins)
I
IH
Input HIGH Current (Input pins)
V
CC
= Max.
V
IN
= 5.5V
--
--
1
A
Input HIGH Current (I/O pins)
V
CC
= Max.
V
IN
= V
CC
--
--
1
A
I
IL
Input LOW Current (Input pins)
V
CC
= Max.
V
IN
= GND
--
--
1
A
Input LOW Current (I/O pins)
V
CC
= Max.
V
IN
= GND
--
--
1
A
I
OZH
High Impedance Output Current
V
CC
= Max.
V
OUT
= 5.5V
--
--
1
A
I
OZL
(3-State Output pins)
V
CC
= Max.
V
OUT
= GND
--
--
1
A
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18mA
--
0.7
1.2
V
I
ODH
Output HIGH Current
V
CC
= 3.3V, V
IN
= V
IH
or V
IL
, V
O
= 1.5V
(3)
36
60
110
mA
I
ODL
Output LOW Current
V
CC
= 3.3V, V
IN
= V
IH
or V
IL
, V
O
= 1.5V
(3)
50
90
200
mA
V
OH
Output HIGH Voltage
V
CC
= Min.
I
OH
= 0.1mA
Vcc-0.2
--
--
V
V
IN
= V
IH
or V
IL
I
OH
= 3mA
2.4
3.0
--
V
V
CC
= 3.0V,
I
OH
= 8mA
2.4
(5)
3.0
--
V
V
IN
= V
IH
or V
IL
I
OH
= 24mA
2.0
--
--
V
OL
Output LOW Voltage
V
CC
= Min.
I
OL
= 0.1mA
--
--
0.2
V
V
IN
= V
IH
or V
IL
I
OL
= 16mA
--
0.2
0.4
V
I
OL
= 24mA
--
0.3
0.5
V
I
OS
Short Circuit Current
(4)
V
CC
= Max.
(3)
, V
OUT
= GND 60
85
240
mA
I
OFF
Power Down Disable
V
CC
= 0V, V
IN
or V
OUT
4.5V
--
--
100
A
V
H
Input Hysteresis
--
150
--
mV
Parameters
(1)
Description
Test Conditions
Typ
Max.
Units
C
IN
Input Capacitance
V
IN
= 0V
4.5
6
pF
C
OUT
Output Capacitance
V
OUT
= 0V
5.5
8
pF
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 3.3V, +25C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. This parameter is guaranteed but not tested.
5. V
OH
= V
CC
0.6V at rated current.
Note:
1. This parameter is determined by device characterization but is not production tested.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Capacitance
(T
A
= 25C, f = 1 MHz)
PI74FCT3573
3.3V 8-BIT TRANSPARENT LATCH
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Power Supply Characteristics
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
CC
Quiescent Power Supply Current
V
CC
= Max.
V
IN
= GND or V
CC
0.1
10
A
I
CC
Quiescent Power Supply Current
V
CC
= Max.
V
IN
= V
CC
0.6V
(3)
2.0
30
A
TTL Inputs HIGH
I
CCD
Dynamic Power Supply
(4)
V
CC
= Max.,
V
IN
= V
CC
95
100
A/
Outputs Open
V
IN
= GND
MHz
OE = GND
One Bit Toggling
50% Duty Cycle
I
C
Total Power Supply
V
CC
= Max.,
V
IN
= V
CC
0.6V
0.97
2.3
mA
Current
(6)
Outputs Open
V
IN
= GND
f
I
= 10 MH
Z
50% Duty Cycle
OE = GND
One Bit Toggling
V
CC
= Max.,
V
IN
= V
CC
0.6V
1.9
4.7
(5)
Outputs Open
V
IN
= GND
f
I
= 2.5 MH
Z
50% Duty Cycle
OE = GND
8 Bits Toggling
Notes:
1. ForMax. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 3.3V, +25C ambient.
3. Per TTL driven input; all other inputs at Vcc or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested.
6. I
C
=I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+ I
CCD
(f
CP
/2 + f
I
N
I
)
I
CC
= Quiescent Current (I
CCL
, I
CCH
and I
CCZ
)
I
CC
= Power Supply Current for a TTL High Input
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
N
CP
= Number of Clock Inputs at f
CP
f
I
= Input Frequency
N
I
= Number of Inputs at f
I
All currents are in milliamps and all frequencies are in megahertz.
PI74FCT3573
3.3V 8-BIT TRANSPARENT LATCH
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Switching Characteristics over Operating Range
(1)
FCT3573
Com.
Parameters
Description
Conditions
(2)
Min
(3)
Max
Units
t
PLH
Propagation Delay
C
L
= 50pF
1.5
4.2
ns
t
PHL
Dx to Ox
R
L
= 500
t
PLH
Propagation Delay
2.0
5.5
ns
t
PHL
LE to Ox
t
PZH
Output Enable Time
1.5
5.5
ns
t
PZL
OE to Ox
t
PHZ
Output Disable Time
(4)
1.5
5.0
ns
t
PLZ
OE to Ox
t
SU
Setup Time HIGH
2.0
ns
or LOW, Dx to LE
t
H
Hold Time HIGH
1.5
ns
or LOW, Dx to LE
t
W
LE Pulse Width
(4)
5.0
ns
HIGH
t
SK
(o)
Output Skew
(5)
0.5
ns
Notes:
1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V 0.3V, normal range.
For Vcc = 2.7V, extended range, all Propagation Delays and Enable/Disable times should
be degraded by 20%.
2. See test circuit and wave forms.
3. Minimum limits are guaranteed but not tested on Propagation Delays.
4. This parameter is guaranteed but not production tested.
5. Skew between any two outputs, of the same package, switching in the same direction.
This parameter is guaranteed by design.
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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